<script   src="http://code.jquery.com/jquery-3.3.1.slim.min.js"   integrity="sha256-3edrmyuQ0w65f8gfBsqowzjJe2iM6n0nKciPUp8y+7E="   crossorigin="anonymous"></script>
<script src="GoodPaths.js"></script>
<html>
    结果是：<span class="_sum"></span>
</html>